A Red Flag Warning means there is an increased risk for fires to start and spread. ORLANDO, Fla. – A Red Flag Warning is in effect for areas along and southeast of I-4 through Thursday evening. A Red Flag Warning means that critical fire weather conditions are occurring now or will shortly. The combination of low relative humidity and strong winds can contribute to extreme fire behavior. Rainfall update since JanuaryThe dry vegetation combined with low relative humidities will create an enhanced fire risk Thursday.